In a past life we used them in MIL application.  Put them on Kevlar PCB's to provide a better CTE match.  Limited size (I believe it was LCC20 or LCC24 max...). Also used elevated solder joints.  

Bottom line...  Was a very costly part to use (material $ for PCB, process development and validation, special process, etc.)

Also used them mounted to a ceramic substrate.  Perfect CTE match, no problems.



>>> [log in to unmask] 07/20/00 11:35AM >>>
Greetings,

Is anybody out there using leadless ceramic chip carriers in a military environment without attaching leads?  If so, what size are you using?  

Thanks in advance for any information,

Bill Robinson

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